Public-speaking telephone receiver



Jan. 6, 1925.

B. E. COVER PUBLIC SPEAKING TELEPHONE RECEIVER Filed July 1, 1921 Patented Jan. 6, 1925.

BERKEY E. COVER, OFlCI-IICAGO, ILLINoIs, itssionon or ONE-HALF T0 WILLIAM G.

KEITH, or eHIoAeo, ILLINOIS.

PUBLIC-SPEAKING TELEPHONE RECEIVER.

Application filed July 1, 1921. Serial No. 481,782.

To all whom it may concern:

Be it known that I, BERKEY E. Coven, a citizen of the United States, residing at Chicago, in the eountyof Cook and State of Illinois, have invented certain new and useful Tmprovements in Public-Speaking Telephone Receivers, of which the following is a specification.

The object of this invention is toprovide a telephone receiver suitably and eliiciently rotected for out-of-doors installation an capable of being adjusted to increase or decrease the volume of sound with-- out disassembling any of the parts so that the instrument, when provided with a suitable amplifying horn, may be employed as a public speaker to reproduce in public places ,any sounds that may be transmitted thereto.

My invention is adapted to be installed on a pole at a street corner for reproducing a speech being delivered in a public hall at some distant location so that the speech may be heard distinctly by a large gathering of persons adjacent the pole; and many of these instruments may be so installed and connected to reproduce the same speech so that a speech being delivered at some location may be reproduced simultaneously at many different places and thereby be given wide spread distribution.

It is desirable that an instrument of this kind should be capable of adjustme'nt after it has been installed without requiring that it be'taken down or that any of its parts be disassembled because the installation will ordinarily be made on a pole or some other support where it is not always convenie tly accessible; and for this reason my invention has for its object to provide the instrument with means whereby it can be easily adjusted to reproduce sounds in a desired tone and volume by m: nipulating certain adjusting means on themutsidc of.

the weather-proof enclosing casi g.

It is also desirable that-an instrunientof this kind should be capable ofadjustment .to any desired angle or inclination to direct the sound in any desired direction and for this purpose ,my invention has for its object to provide a bracket mounting for the casing to furnish auniversal connection so that the horn may be pitched in any position.'-

Another object of the invention is to.

preyent the diaphragm from shifting its position and at the same ti" ie to avoid stifiness and rigidity and permit the diaphragm to vibrate freely as required for satisfactory reproduction.

In the accompanying drawings I have illustrated a selected embodiment of the invention and referring thereto Fig. 1 is a plan view of the inventio the horn being omitted Fig. 2 is asectional view on the line of Fig. 1.

Referring to the drawings the invention comprises a metal casing 3 having an ear 4, a bracket arm 5 pivotally connectrl to said car by a bolt 6 and a support 7, pivotally connected to the-arm 5 by a bolt 8.

The arm 5 and likewise the support .7 may be of any size and shape to adapt the instrument for different installations but it will be found that a support such as'the dislc illustrated may be used for many installations since it can be secured in place by screws, bolts, nails, wire or other fastening means to a wall, a pole orother fixed support.

The casing is conveniently conical in shape and a diaphragm 9 is secured'between the clamping ring 11 and the front plate 10 which form a housing located in thelarge end of the casing. The diaphragm is arranged between rubber rings 12, 12 located on opposite sides of the diaphragm at the periphery thereof and engage the diaphragm to hold the latter securely'between the elamping'ring and front plate of the housing which are secured together by screws 13. firmly but yieldingly so that it canvibrate freely and LO prevent it from shifting position I- provide the diaphragm housing with studs 14 enclosed in.rubber tubes 14-" The rings hold the diaphragm which fit in openings prot/ided for them in se studs are located the diaphragm. Th preferably at diameti on the front plate of" the diaphragm housing and they effectively prevent the diaieally opposite points ice casing by screws 15 and a rubber gasket 16 is interposed between the'plate 15 on one side and the casing andfrontplate of the diaphragm housing on the other side. The diaphragm housing is flush wlth the outer *end of the casing and it is provided with a centrally disposed tubular neck 17 which projects through the gasket and the facing plate and may be exteriorly threaded to receive a suitable -amplifying horn.

A magnet housing 18 is screw threaded in is a rigid part oft-he magnet housing, to

rigidly secure these pal-tstogether. A terminal block-.Zis secured in the permanent magnet and wire leads 25, 26 are'jconnected to said block andto terminals 26 on the casing; VVires27, 27' are also connected to the terminal block and to the magnets.

' The rear end of the permanent magnet is supported ina yoke28 carried on a rod 29 ing the locking screw 31 and operating the" wing'nut 30 to adjust the magnet housing inwhich projects through the rear end of the casing and is provided with a wing nut'30 to facilitate adjustment. A set screw 31 in the casing is arranged to bear on the rod 29 to secure the latter in adjusted position. A brass washer 32' is fastened securely on a felt washer 33 against the rear end of the casing by screws 34 to make the casing weather-tight around the rod 29.

My inventionprovides a telephone receiver in which all of the operating parts are efficiently protected against the weather so that it can be'used out-of-doors under all conditions and in any place. The bracket arm provides'a convenient means for supporting the casing in any adjusted position whereby the horn may be tilted to direct the sound in any desired direction which makes it convenient for use as a public speaker when installed on a street'pole or other out of door support. The magnets can be easily ad usted relative to the diaphragm by loosenthe diaphragm housing in which it is screw threaded. This adjustment can be made to increase or decrease the volume and quality of the sound reproduced and when the desired adjustment is obtained the set screw 2-31 is turned to locking position to permanently maintain the parts in the position to WhlCh they have been adjusted; often desirable to make this adjustment or to readust the parts after the instrument has been installed and since the instrument cannot always receive constant attention when it is used for public speaking in public places it ishighly desirable not only that thisadjustiuent should be easily made without disassembling any of the parts but also that t should be permanently maintained after it is made, and both otthese objects are attained by my invention in asimple, efiicient and convenient manner. The casing forms a protection for the operative parts of the instrument so thatit 1s adapted for universal use out-of-doorsfunder "all conditions of weather, and iiiall seasons of the yearI My invention is not only useful for reproducing speeches, notices, announcements, and in fact any kind'of sounds for any purpose, but it has many special uses such as furnishing music for skating ponds and for many other purposes.

I am aware that changes in the form, proportion and arrangement of parts of my invention may be made to adapt it for different purposes and different installations and I therefore reserve the right to make all such changes as fairly fall within the scope of the following claims.

, I claim:

l. The combination of a casing, a telephone receiver supported in the casing and comprising a diaphragm and a magnet, a housing for the diaphragm provided with a neck to receive a horn, a housing for the A magnet, and means connected to said magnet housing and projecting through the casing and adapted to be operated to adjust the magnet and diaphragm relatively to each other.

' 2. The combination of a casing, a telephone receiver supported in the casing and comprising a diaphragm and a magnet, a housing for the diaphragm secured in one end of the casing and provided with a neck projecting from the casing and adapted to receive a horn, a housing for the magnet,

and means operating through the opposite end of the casing and connected to the magnot housing for adjusting the magnet housing in the diaphragm housing to adjust the diaphragm and magnet relatively to each other.

3. The combination of a casing, a telephone receiver supported in the casing and comprising a diaphragm and a magnet, a diaphragm housing secured in one end of the casing and provided with a centrally disposed neck to receive a horn, a magnet housing threadedly engaging the diaphragm housing, a rod operating through the other end of the casing and connected with said magnet housing for adjusting the magnet housing in the diaphragm housing, and means for locking said rod in adjusted positron.

,4. The combination of a casing, a telephone receiver supported in the casing and comprising adiaphragm and a magnet, a diaphragm comprising a front plate and a clamping. ring secured in one prevent t end of the casing, said front plate having acentrally disposed neck to receive a horn, a face plate secured to the casing over said diaphragm housing, a magnet housing screw threaded in the clamping ring of the diaphragm housing, and means operating through the other -end of the casing and connected to the magnet housing to adjust said housing in the diaphragm housing for adjusting the diaphragm and magnet relatively to each other.

The combination of a casing, a telephone receiver supported in the casing and comprising a diaphragm and a magnet, a diaphragm housing supporting the diaphragm and secured in one end of the cas ing, a magnet housing supporting the magnet and threadedly engaging the diaphragm housing, a permanent magnet secured to the magnet housing, and a rod connected to the permanent magnet and projecting through the other end of the casing and adapted to be operated to adjust the magnet housing in the diaphragm housing and the magnet relatively to the diaphra m.

6. The combination 0 phone receiver supported in the casing and more openings therein, a housing, sound insulating means engaging the margin of the diaphragm for supporting the diaphragm in the housing, and studs on ,t-hc housing rejecting into said openings to he diaphragm from shifting position.

a casing, a tele more openings therein, a housing, rubberrings arranged on opposite sides of the diaphragm at the periphery thereof and supporting the diaphragm in the housing, and rubber covered studs on the housing projecting into said openings.

9. The combination ofa telephone receiver comprising a diaphragm and a magnet, a

housing for the diaphragm, a support for the magnet, and a casing enclosing both said housing and said support, and protecting the face of saiddiaphragm.

10. The combination of a telephone receiver comprising a diaphragm'and a magnet, a housing for the diaphragm, a support for the magnet, a casing enclosing both said housing and said support, and protecting the face of said diaphragm, and means connected to said magnet and projecting through the casing and adaptedto be operated for adjusting the magnet and diaphragm relatively to each other.

BERKEY E; COVER. 

